A powerful detergent with NO fragrance. This is the only product we use to scour! We also use it for heavily soiled laundry (our son is a mechanic, we have tested this!) as well as cleaning carpets/pet stains, mopping floors and washing walls/baseboards/handrails. We basically use it like a really concentrated all purpose cleaner. For a scented experience, try Unicorn Power Scour. All Unicorn products are: Effective in all water temperatures (although for really greasy stuff get that water hot) Earth friendly & biodegradable. Not tested on animals Gentle & FREE from dyes, phosphates, fillers, or irritants. HE compatible Concentrated, less is more! Made in the USA by a family-owned business. Melly loves to break down costs! The breakdowns below are for scouring wool and are in CAD. $9 for a 4oz bottle. 4oz = 8 tbsp. $9 / 8 tbsp = $1.12 per tbsp. We use 3 tbsp on average per pound, $1.12 x 3 = $3.36 cost per pound to scour with a 4oz bottle. Based on 3 tbsp per pound, you can scour 2.5 lbs of wool with this size. $30 for 16oz. 16oz = 32 tbsp. $30 / 32 tbsp = $0.93/ per tbsp. We use 3 tbsp on average per pound, $0.93 x 3 = $2.79 cost per pound to scour with a 16oz bottle. Based on 3 tbsp per pound, you cab scour 10.5 lbs with this size. $150 for 1 Gallon. 1 Gallon = 256 tbsp. $150 / 256 =$0.59 per tbsp. We use 3 tbsp on average per pound, $0.59 x 3 =$1.77 cost per pound to scour with a 1 gallon jug. Based on 3 tbsp per pound, you can scour 85lbs of wool with this size. **These breakdowns do not include any applicable taxes or shipping costs. Depending on that, round up a bit on the "cost per pound to scour" to cover those extras!